JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://cdnjs.cloudflare.com/ajax/libs/jquery/1.9.0/jquery.min.js"></script>
<div id="content">
    <div id="up-left">
        <div id="box" style="background: red" class="snap white">
             <h1>ONE</h1>
            <a class="more" href="" title=""></a>
        </div>
        <div id="box" class="snap black">
             <h1>TWO</h1>
                <a class="more" href="" title=""></a>
        </div>
        <div id="box" class="snap white">
             <h1>THREE</h1>  <a class="more" href="" title=""></a>
        </div>
        <div id="box" class="snap black">
             <h1>FOUR</h1>  <a class="more" href="" title=""></a>
        </div>
        <div id="box" class="snap white">
             <h1>FIVE</h1>  <a class="more" href="" title=""></a>
        </div>
        <div id="box" class="snap black">
             <h1>SIX</h1>  <a class="more" href="" title=""></a>
        </div>
    </div>
    <div id="down-right">
        <div id="box" style="background: green" class="black">
             <h1>ONE</h1>
            <a class="more" href="" title=""></a>
        </div>
        <div id="box" class="white">
             <h1>TWO</h1>
            <a class="more" href="" title=""></a>
        </div>
        <div id="box" class="black">
             <h1>THREE</h1>
            <a class="more" href="" title=""></a>
        </div>
        <div id="box" class="white">
             <h1>FOUR</h1>
            <a class="more" href="" title=""></a>
        </div>
        <div id="box" class="black">
             <h1>FIVE</h1>
            <a class="more" href="" title=""></a>
        </div>
        <div id="box" class="white">
             <h1>SIX</h1>
            <a class="more" href="" title=""></a>
        </div>
    </div>
</div>
<script>
    function crisscross() {
        $('up-left').style.bottom = '-' + window.scrollY + 'px';
        $('down-right').style.bottom = '-' + window.scrollY + 'px';

    }
    window.onscroll = crisscross;
</script>

CSS

div#content {
    width: 100%;
    height: 100%;
    position: absolute;
    top:0;
    right:0;
    bottom:0;
    left:0;
}
h1 {
    margin: 0;
    padding: 0;
    color:#fff
}
#box {
    position: relative;
    width: 100%;
    height: 500px;
    display: block;
    margin: 0;
    padding: 0;
}
.black {
    background: black;
}
.white {
    background: grey;
}
div#up-left {
    position:absolute;
    z-index:4px;
    left: 0;
    top: 0;
    width: 50%;
    margin: 0;
    padding: 0;
}
div#down-right {
    position:fixed;
    bottom: 0px;
    z-index: 5px;
    left: 50%;
    width: 50%;
    margin: 0;
    padding: 0;
}

JavaScript

jQuery.noConflict();
        var ele = document.getElementById("box");
        var arr = jQuery.makeArray(ele);
        var data = (ele)[0];
    
      $(window).scroll(function() {
    
        if ( $(window).scrollTop() >= 1000) {
    
          $(data).clone().appendTo('body');
    
        } else {
          
        }
    
      });